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Branching fraction measurements of B+ -> ρ(+)γ, B(0) -> ρ(0)γ, and B(0) -> ω^γ

Other TitlesBranching fraction measurements of B+->rho(+)gamma, B-0 ->rho(0)gamma, and B-0 ->omega gamma
AuthorsGrauges, E.; Azzolini, Virginia; López-March, Neus ; Martínez-Vidal, Fernando ; Oyanguren, Arantza ; Babar Collaboration; Aubert, B.
KeywordsTo-leading Order
Radiative decays
[PACS] Leptonic/semileptonic decays of bottom mesons
[PACS] Determination of electroweak Kobayashi–Maskawa matrix elements
[PACS] Bottom mesons
Issue Date13-Apr-2007
PublisherAmerican Physical Society
CitationPhysical Review Letters 98(15): 151802 (2007)
AbstractWe present a study of the decays B+ -> ρ(+)γ, B(0) -> ρ(0)γ, and B(0) -> ω^γ. The analysis is based on data containing 347 x 10(6) B(B)[over-bar] events recorded with the BABAR detector at the PEP-II asymmetric B factory. We measure the branching fractions B(B+ -> ρ(+)γ)=(1.10(-0.33)(+0.37)±0.09)x10(-6) and B(B(0) -> ρ(0)γ)=(0.79(-0.20)(+0.22)±0.06)x10(-6), and set a 90% C.L. upper limit B(B(0) -> ω^γ) < 0.78x10(-6). We also measure the isospin-averaged branching fraction B(B -> (ρ/ω)^γ)=(1.25(-0.24)(+0.25)±0.09)x10(-6), from which we determine |Vtd/Vts| = 0.200(-0.020)(+0.021)±0.015, where the first uncertainty is experimental and the second is theoretical.
Description7 pages, 1 figure, 2 tables.-- PACS nrs.: 13.20.He; 12.15.Hh; 14.40.Nd.-- ISI Article Identifier: 000245691400015.-- ArXiv pre-print available at: http://arxiv.org/abs/hep-ex/0612017.-- et al.
Publisher version (URL)http://dx.doi.org/10.1103/PhysRevLett.98.151802
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